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(No Modem f E. H. FRIEDRIGHS.

CLAMP FOR EASBLS.

No. 455,844. Patented July 14,1891.

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A provement.

UNITED STATES PATENT OFFICE.-

ERNEST H. FRIEDRICHS, OF NEW YORK, N. Y.

*CLAMP FOR EASE SPECIFICATION forming part of Letters Patent No.455,844, dated July 14, 1891, Application tiled February 18, 1891.Serial No. 381|930. (Nomodel.)

To all whom t may concern:

Be it known that I, ERNEST H. FRIEDRICHS, ot' New York city, New York,have invented an Improved Clamp for Easels, of which the following is aspecification.

This invention relates to a clamp for locking the lower adjustablesections of the easellegs to the upper fixed sections.

The invention consists in the various features of improvement more fullypointed out .in the claims.

In the accompanying drawings, Figure 1 is an elevation of an easelprovided with my im- Fig. 2 is a vertical longitudinal section throughthe clamp; Fig. 3, a rear view thereof. Fig. lis a verticallongitudinalsecsection7 partlyin side view, of a modification; and Fig. 5, a rearView thereof.

The letters arepresent the upper sections of the legs of an easel, and aare the adjustable sections, the whole constituting an adjustabletripod. The sections a are provided with straps b, that embrace sectionsa', while the sections aare provided with straps b', that embracesections a. Thus the sections a a are interlocked, and the sections aare free to be slid up or down to any desired extent, which permits theeasel to be adjusted to any unevenness of the ground.

In order to clamp the sections a when adjusted to the sectionsa, Iemploy the following construction: Each section o. is perforated nearits upper end, and into this perforation there is screwed a metal socketor sleeve c, having a head c', as shown. The socket is provided with atapped longitudinal bore for the reception of a thumb-screw d. Thelength of the socket c is such only that it does not project entirelythrough the thickness of the section a,but terminates opposite cut intothe inner face of Tithin this mortise there is a flat mortise a2,section a.

placed a brake disk or plate adapted to be forced by screw d againstsection d and to thus clamp the sections da by pushing them outward andagainstthe straps b b.

In Figs. 2 and 3 the brake consists of a iiexible plate e, pivotedwithin the mortise g2 by screw f, upon which it vibrates as it ispressed outward by the screw d. When the screw CZ is withdrawn, theplate resumes its normal position and re-enters the mortise d2 by itsown elasticity. In Figs. 4 and 5 lthe placed by a rigid end of the screwd. This disk is pushed outward againstsection a, or is made to recedetherefrom by the corresponding motion of the screw.

pivoted plate e is re- My improved clamp may also be applied to theslide canvas.

The advantage of my durable, will not split orinjure the \vood,and isvery effective.

What I claim isg, that engages the upper edge of the l. The combinationof a tripod composed of interlocked sections aand sections a., havingmortises a2, with threaded sockets c,inserted in sections a', screws cl,received by said sockets, and with brake-disks placed within mor-v tises0.2 and operated by screws d, substantially as specified.

` 2. The combination of a tripod'composed of interlocked sections@ andsections a', having mort-ises n.2, with the threaded sockets c, insertedin sections 0.', screws d, received by said sockets, and with pivotedflexible brakedisks e, placed within mortises a2 and operated by thescrews, substantially as specified.

ERNEST H. FRIEDRICI-IS. Vitnesses:

F. v'. BRIESEN, A. JoNeHMANs.

disk e', mounted upon the' clamp is that it is

